Samantha Raphelson

The U.S. reimposed a round of sanctions against Iran that went into effect early Tuesday, a move the Trump administration hopes will further damage the Iranian economy and force concessions from Tehran on a number of fronts.

It's been a decade since the financial crisis drove up the unemployment rate in the U.S. and forced people in the prime of their careers to give up looking for work.

Even today, as employers add jobs at a furious pace, the workforce participation rate still hasn't recovered. And now researchers think they know one reason why: the opioid crisis.

Updated at 6:22 p.m. ET

The 17-year-old who is accused of opening fire at a Texas high school on Friday, killing at least 10 people and wounding 13 others, has been charged with capital murder and aggravated assault.

Updated at 10:18 p.m.

Lava continued to spew out of cracks in the ground Sunday night after increased activity at Hawaii's Kilauea volcano last week, which destroyed at least 26 homes and forced more than 1,700 people to evacuate.

The Duke and Duchess of Cambridge released two new photos of the newest addition to the royal family, Prince Louis, on Sunday.

A bombing inside a mosque in eastern Afghanistan on Sunday killed at least 14 people and wounded dozens more, Afghan officials said.

The blast took place during afternoon prayers at the mosque in the city of Khost, the capital of the province of the same name. The mosque was also being used as a voter registration center for parliamentary elections set for October, marking the latest in a series of attacks on election-related facilities.

The world's largest active geyser has erupted three times in the past two months at Yellowstone National Park, leaving scientists puzzled by the sudden and relatively frequent explosions.

The White House has ordered the State Department to put on hold $200 million in recovery funds to Syria, following President Trump's remarks last week signaling a possible withdrawal of American troops from Syria.

Updated on Sunday at 10:00 a.m. ET

Hundreds of thousands of students, teachers, parents and victims rallied in Washington, D.C., and across the country on Saturday to demand tougher gun control measures, part of a wave of political activism among students and others impacted by school shootings.

Vice President Mike Pence is facing backlash for his staunch efforts to ignore North Korean officials at the Winter Olympic Games, even as the two Koreas continued their temporary truce, marching and competing as one team.

Pence's cold demeanor toward the North Koreans at the Pyeongchang games was overshadowed by friendly cooperation between the North and South. The vice president also drew criticism from some openly gay members of Team USA, who questioned his role at the Olympics due to his anti-LGBT views.

Lawmakers in the United Kingdom are debating a new tax on disposable cups in an effort to cut down on waste.

While the so-called "latte levy" is controversial, the goal is to replicate the success of Britain's tax on plastic bags; their use has declined by 80 percent since the tax was introduced in 2015. Proponents of the tax say it would encourage people to carry around their own reusable cups rather than use disposable ones, which in their current form are difficult to recycle.

Homeless shelters across the country are being strained by frigid weather and a population of people who are homeless that is up for the first time since 2010, according to the U.S. Department of Housing and Urban Development.

Palestinian Christians attacked the convoy of the Greek Orthodox Patriarch of Jerusalem during a visit to Israeli-occupied West Bank on Saturday to protest the church's controversial property sales to Jewish and Israeli buyers.

The number of migrants who died crossing the Mediterranean Sea surpassed 3,000 for the fourth year in a row, despite an overall drop in the number of refugees making the journey.

The International Organization for Migration has called the Mediterranean "by far the world's deadliest border," as more than 33,000 migrants have died at sea trying to enter Europe since 2000.

Updated at 1:07 p.m. ET

President Trump insisted Saturday that he is "a very stable genius," following the recent publication of a book that raises questions about his mental state and fitness for office.

Speaking to reporters at Camp David on Saturday, Trump called Michael Wolff, author of Fire and Fury: Inside The Trump White House, "a fraud" and reiterated his earlier claim on Twitter that Wolff is not trustworthy.

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